Fe-based amorphous alloy and dust core made using Fe-based amorphous alloy powder

  • US 9,558,871 B2
  • Filed: 12/19/2013
  • Issued: 01/31/2017
  • Est. Priority Date: 07/28/2011
  • Status: Active Grant
First Claim
Patent Images

1. An Fe-based amorphous alloy consisting of Fe, Cr, P, C, B, and Si, represented by a formula Fe100-a-b-c-d-eCraPbCcBdSic, where a, b, c, d, and e are in terms of at %, whereina composition ratio a of Cr satisfies 0 at %≦

  • a≦

    1.9 at %,a composition ratio b of P satisfies 4.7 at %≦

    b≦

    6.2 at %,a composition ratio c of C satisfies 5.2 at %≦

    c≦

    8.2 at %,a composition ratio d of B satisfies 6.2 at %≦

    d≦

    10.7 at %,a composition ratio e of Si satisfies 0 at %≦

    e≦

    1.0 at %,a composition ratio of Fe (100-a-b-c-d-e) is 77 at % or more, andthe composition ratios b, c, d, and e satisfy the following relationships;


    19 at %≦

    b+c+d+e≦

    21.1 at %,
    0.08≦

    b/(b+c+d)≦

    0.43,
    0.06≦

    c/(c+d)≦

    0.87, andwherein the Fe-based amorphous alloy exhibits a glass transition point (Tg) and have a saturation magnetic flux density equal to or higher than 1.5 T.

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